Variable-speed gearing



Ju1y-24, 192s.

K 1,678,289 A, v. HARTMANN ARIABLE SPEEUGEARING Filed Marone, V1927 yPatented July 2.4-, 1928.

l"Invrrlzn s'rxrssv PATENT- OFFICE.

,ANTON V. HARTMANN, OF ST. PAUL, MINNESOTA, ASSIGNOR OF ONE-HALF TO VICTOR H. STEVENS, 0F ST. PAUL, MINNESOTA.

. VARIABLE-SPEED GEARING.

Application filed March 8, 1927. Serial No. 173,705.

Specifically considered the invention relates to farming machinery and provides motive power whereby an implement may be propelled over the ground and at the same time perform work, or may be utilized as a stationary engine for driving milling or other machinery.

The invention furthermore relates to a variable speed power take-off located between two transmissions, whereby operation of the transmission on the engine side of the take-oit' .controls both the speed of the apparatus or part to be driven and the speed of the vehicle, and operation of the transmission lon the opposite Side of the take-olf and connected with the running gear of the vehicle controls the speed of the vehicle without changing the speed of the apparatus' or part to be driven. As' a result the speed of the vehicle may be varied without changing the speed of the apparatusor part to be driven.

lVhile thedrawings illustrate a preferred embodiment of the invention, it is to4 be understood that in adapting the means to moet specific needs and requirements, the design may be varied and-such other changes in the minor details of construction may be resorted to within the scope of the invention spirit thereof.

For a full understanding of the invention as claimed, without departing from the l and the merits thereof, reference is to be had to the following description and the drawings hereto attached, in which,-

Figure 1 is a top plan view of the chassis of a motor vehicle, embodying the invention.

Figure 2 is an enlarged detail view on-the line 2-2 of Figure 1. y

Corresponding and like part-s are referred to in the following description and designated in both views of the drawings by like reference characters.

The chassis illustrated is substantially of the general construction provided for motor vehicles, and is illustrated to demonstrate the application of the invention. The numeral 1 designates the engine which maybeof any make' or design, generally employedV extending from the transmission 2. numeral 6 designates the drive shaft interposed between the transmission 4 and the differential of the rear axle. 7

In accordance with the invention a bevel gear wheel 7 is loose upon the shaft 5 and is adapted to be secured thereto by means of a clutch member 18 splined/to the shaft 5 and movable thereon by means of a shifting lever 8 having a fork to engage a groove formed `in the clutch member. A shaft 9 is disposed transversely of the chassis and mounted in suitable bearings. .A bevel gear wheel 10, fast to the inner end of the shaft 9 is adapted to mesh with the teeth of the gear wheel 7. A pulley 11 loose upon the outer end of the shaft 9 is adapted to receive a drive belt, not shown, whereby'to operate any machinery to be driven. A clutch meniber 19 splincd upon the shaft 9 is adapted to engage the pulley 11 yand cause it to rotate with the shaft 9. A lever 20 mounted upon the 'chassis engages the clutch member 19 and provides means for shifting it to causo the pulley and shaft to rotate in unison when required. A vertical shaft 12 suitably mountedupon the chassis is provided at xits upper end-with a bevel gear wheel 13 which is fast thereto and adapted to coact with the gear wheel 7. A disk 14 is fast Ito thel lower -end of the vertical shaft 12 and is provided with a crank pin 15. A pitman 16 forms connecting mea-ns between the crank pin 15 and the cutter bar 17 of a mowing mechanism.

.llhen the cutting mechanism is in operation the vclutch member 18 in engagement with the gear wheel 7 thejlatter rotates with the shaft 5 and operates the gear wheels 10 and. 13. Upon throwing the transmisison 4 into gear it will be understood that the machine may be propelled at the required speed. When both transmissions 2 and 4 are in gear and the clutch member 18 is moved to release the'gear wheel 7 the machine may be propelled without any movementbeing imparted to either of the shafts 9 and 12. It

The I will thus hemnderstood that the maehne inelndinfr amel-or and drive ,shaft separate. 15

may he vutilized in the capacity of a staand independent transmiseions in the length tionary engine for operating any machinery of the (lriveshaft, a gear Wheel loose on the to he driven, or may be propelled over the. drive shaft, a clutch member for connecting lield and at the same time operate any meehthe loose gear wheel to the drive shaft, other :mism to he driven, such as a cutting meeha-` shafts geared to the said loose gear Wheel, a 20 nien), a planting mechanism, or the like.d pulley loose on one 'of the last mentioned lVhen moving the machine from Vplace to shafts, aclnteh member for connecting the place the shafts 9 and 12 are thrown ont ot pulley to its shaft, and an operating meeh" gear by shifting the clutch member 18 to reanism detaehahly connected with the other lease the gear wheel 7, v one'of the last mentioned shafts. 25 Ilaving thus describedthe invention, y] In testimony whereof l aix my signature. i claim:

-In n, machine mounted upon Wheeis :ma ANTON v. HARTMANN. l [L A] 

